/*************************************************************************
  This code is from Dynamic Web Coding at dyn-web.com
  Copyright 2001-5 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/
dw_scrollObjs = {}; dw_scrollObj.speed = 130; function dw_scrollObj(wnId, lyrId, cntId) { this.id = wnId; dw_scrollObjs[this.id] = this; this.animString = "dw_scrollObjs." + this.id; this.load(lyrId, cntId);}
dw_scrollObj.loadLayer = function(wnId, id, cntId) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].load(id, cntId);}
dw_scrollObj.prototype.load = function(lyrId, cntId) { if (!document.getElementById) return; var wndo, lyr; if (this.lyrId) { lyr = document.getElementById(this.lyrId); lyr.style.visibility = "hidden";}
lyr = document.getElementById(lyrId); wndo = document.getElementById(this.id); lyr.style.top = this.y = 0; lyr.style.left = this.x = 0; this.maxY = (lyr.offsetHeight - wndo.offsetHeight > 0)? lyr.offsetHeight - wndo.offsetHeight: 0; this.wd = cntId? document.getElementById(cntId).offsetWidth: lyr.offsetWidth; this.maxX = (this.wd - wndo.offsetWidth > 0)? this.wd - wndo.offsetWidth: 0; this.lyrId = lyrId; lyr.style.visibility = "visible"; this.on_load(); this.ready = true;}
dw_scrollObj.prototype.on_load = function() {}
dw_scrollObj.prototype.shiftTo = function(lyr, x, y) { lyr.style.left = (this.x = x) + "px"; lyr.style.top = (this.y = y) + "px";}
dw_scrollObj.GeckoTableBugFix = function() { var ua = navigator.userAgent; if ( ua.indexOf("Gecko") > -1 && ua.indexOf("Firefox") == -1
&& ua.indexOf("Safari") == -1 && ua.indexOf("Konqueror") == -1 ) { dw_scrollObj.hold = []; for (var i=0; arguments[i]; i++) { if ( dw_scrollObjs[ arguments[i] ] ) { var wndo = document.getElementById( arguments[i] ); var holderId = wndo.parentNode.id; var holder = document.getElementById(holderId); document.body.appendChild( holder.removeChild(wndo) ); wndo.style.zIndex = 1000; var pos = getPageOffsets(holder); wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px"; dw_scrollObj.hold[i] = [ arguments[i], holderId ];}
}
window.addEventListener("resize", dw_scrollObj.rePositionGecko, true);}
}
dw_scrollObj.rePositionGecko = function() { if (dw_scrollObj.hold) { for (var i=0; dw_scrollObj.hold[i]; i++) { var wndo = document.getElementById( dw_scrollObj.hold[i][0] ); var holder = document.getElementById( dw_scrollObj.hold[i][1] ); var pos = getPageOffsets(holder); wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px";}
}
}
function getPageOffsets(el) { var left = el.offsetLeft; var top = el.offsetTop; if ( el.offsetParent && el.offsetParent.clientLeft || el.offsetParent.clientTop ) { left += el.offsetParent.clientLeft; top += el.offsetParent.clientTop;}
while ( el = el.offsetParent ) { left += el.offsetLeft; top += el.offsetTop;}
return { x:left, y:top };}
dw_scrollObj.slideDur = 500; dw_scrollObj.scrollBy = function(wnId, x, y, dur) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].glideBy(x, y, dur);}
dw_scrollObj.scrollTo = function(wnId, x, y, dur) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].glideTo(x, y, dur);}
dw_scrollObj.prototype.glideBy = function(dx, dy, dur) { if ( !document.getElementById || this.sliding ) return; this.slideDur = dur || dw_scrollObj.slideDur; this.destX = this.destY = this.distX = this.distY = 0; this.lyr = document.getElementById(this.lyrId); this.startX = this.x; this.startY = this.y; if (dy < 0) this.distY = (this.startY + dy >= -this.maxY)? dy: -(this.startY + this.maxY); else if (dy > 0) this.distY = (this.startY + dy <= 0)? dy: -this.startY; if (dx < 0) this.distX = (this.startX + dx >= -this.maxX)? dx: -(this.startX + this.maxX); else if (dx > 0) this.distX = (this.startX + dx <= 0)? dx: -this.startX; this.destX = this.startX + this.distX; this.destY = this.startY + this.distY; this.slideTo(this.destX, this.destY);}
dw_scrollObj.prototype.glideTo = function(destX, destY, dur) { if ( !document.getElementById || this.sliding) return; this.slideDur = dur || dw_scrollObj.slideDur; this.lyr = document.getElementById(this.lyrId); this.startX = this.x; this.startY = this.y; this.destX = -Math.max( Math.min(destX, this.maxX), 0); this.destY = -Math.max( Math.min(destY, this.maxY), 0); this.distY = this.destY - this.startY; this.distX = this.destX - this.startX; this.slideTo(this.destX, this.destY);}
dw_scrollObj.prototype.slideTo = function(destX, destY) { this.per = Math.PI/(2 * this.slideDur); this.sliding = true; this.slideStart = (new Date()).getTime(); this.aniTimer = setInterval(this.animString + ".doSlide()",10); this.on_slide_start(this.startX, this.startY);}
dw_scrollObj.prototype.doSlide = function() { var elapsed = (new Date()).getTime() - this.slideStart; if (elapsed < this.slideDur) { var x = this.startX + this.distX * Math.sin(this.per*elapsed); var y = this.startY + this.distY * Math.sin(this.per*elapsed); this.shiftTo(this.lyr, x, y); this.on_slide(x, y);} else { clearInterval(this.aniTimer); this.sliding = false; this.shiftTo(this.lyr, this.destX, this.destY); this.lyr = null; this.on_slide_end(this.destX, this.destY);}
}
dw_scrollObj.prototype.on_slide_start = function() {}
dw_scrollObj.prototype.on_slide = function() {}
dw_scrollObj.prototype.on_slide_end = function() {}
dw_scrollObj.stopScroll = function(wnId) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].endScroll();}
dw_scrollObj.doubleSpeed = function(wnId) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].speed *= 3;}
dw_scrollObj.resetSpeed = function(wnId) { if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].speed /= 3;}
dw_scrollObj.initScroll = function(wnId, deg, sp) { if ( dw_scrollObjs[wnId] ) { var cosine, sine; if (typeof deg == "string") { switch (deg) { case "up" : deg = 90; break; case "down" : deg = 270; break; case "left" : deg = 180; break; case "right" : deg = 0; break; default:
alert("Direction of scroll in mouseover scroll links should be 'up', 'down', 'left', 'right' or number: 0 to 360.");}
}
deg = deg % 360; if (deg % 90 == 0) { cosine = (deg == 0)? -1: (deg == 180)? 1: 0; sine = (deg == 90)? 1: (deg == 270)? -1: 0;} else { var angle = deg * Math.PI/180; cosine = -Math.cos(angle); sine = Math.sin(angle);}
dw_scrollObjs[wnId].fx = cosine / ( Math.abs(cosine) + Math.abs(sine) ); dw_scrollObjs[wnId].fy = sine / ( Math.abs(cosine) + Math.abs(sine) ); dw_scrollObjs[wnId].endX = (deg == 90 || deg == 270)? dw_scrollObjs[wnId].x:
(deg < 90 || deg > 270)? -dw_scrollObjs[wnId].maxX: 0; dw_scrollObjs[wnId].endY = (deg == 0 || deg == 180)? dw_scrollObjs[wnId].y:
(deg < 180)? 0: -dw_scrollObjs[wnId].maxY; dw_scrollObjs[wnId].startScroll(sp);}
}
dw_scrollObj.prototype.startScroll = function(speed) { if (!this.ready) return; if (this.timerId) clearInterval(this.timerId); this.speed = speed || dw_scrollObj.speed; this.lyr = document.getElementById(this.lyrId); this.lastTime = ( new Date() ).getTime(); this.on_scroll_start(); this.timerId = setInterval(this.animString + ".scroll()", 10);}
dw_scrollObj.prototype.scroll = function() { var now = ( new Date() ).getTime(); var d = (now - this.lastTime)/1000 * this.speed; if (d > 0) { var x = this.x + this.fx * d; var y = this.y + this.fy * d; if (this.fx == 0 || this.fy == 0) { if ( ( this.fx == -1 && x > -this.maxX ) || ( this.fx == 1 && x < 0 ) || ( this.fy == -1 && y > -this.maxY ) || ( this.fy == 1 && y < 0 ) ) { this.lastTime = now; this.shiftTo(this.lyr, x, y); this.on_scroll(x, y);} else { clearInterval(this.timerId); this.timerId = 0; this.shiftTo(this.lyr, this.endX, this.endY); this.on_scroll_end(this.endX, this.endY);}
} else { if ( ( this.fx < 0 && x >= -this.maxX && this.fy < 0 && y >= -this.maxY ) || ( this.fx > 0 && x <= 0 && this.fy > 0 && y <= 0 ) || ( this.fx < 0 && x >= -this.maxX && this.fy > 0 && y <= 0 ) || ( this.fx > 0 && x <= 0 && this.fy < 0 && y >= -this.maxY ) ) { this.lastTime = now; this.shiftTo(this.lyr, x, y); this.on_scroll(x, y);} else { clearInterval(this.timerId); this.timerId = 0; this.on_scroll_end(this.x, this.y);}
}
}
}
dw_scrollObj.prototype.endScroll = function() { if (!this.ready) return; if (this.timerId) clearInterval(this.timerId); this.timerId = 0; this.lyr = null;}
dw_scrollObj.prototype.on_scroll = function() {}
dw_scrollObj.prototype.on_scroll_start = function() {}
dw_scrollObj.prototype.on_scroll_end = function() {}
function initScrollLayer() { var wndo = new dw_scrollObj('wn', 'lyr1', 't1'); dw_scrollObj.GeckoTableBugFix('wn');}