// JavaScript Document

/*************************

Cross Browser Gradient Backgrounds
v1.0
Last Revision: 11.03.2005
steve@slayeroffice.com

please leave this notice intact.

should you improve upon this code, please
let me know so that I may update the version
hosted on slayeroffice

--- to use --
reference this file (on your own server) as a javascript src
in the head of your document. give the elements
you want a gradient background applied to a class as such:

class="gradient 000000 ffffff horizontal"

See http://slayeroffice.com/code/gradient/ for more examples.

Requirements

The only requirements of the objects to recieve a gradient background are that they be relatively or absolutely positioned so that they may contain absolutely positioned div elements.

Currently, child elements of parents that are set as gradient can not also be gradient. 


*************************/

window.addEventListener?window.addEventListener("load",createGradient,false):window.attachEvent("onload",createGradient);
window.addEventListener?window.addEventListener("load",changePositionStyle,false):window.attachEvent("onload",changePositionStyle);


function createGradient() {
	if(!document.getElementById)return;
	
	objArray = getGradientObjects();
	if(!objArray.length) return;
	
	for(i=0;i<objArray.length;i++) {
		params = objArray[i].className.split(" ");
		if(document.all && !window.opera) {
			objArray[i].style.width = objArray[i].offsetWidth + "px";
			params[3] == "horizontal"?gType = 1:gType = 0;
			objArray[i].style.filter = "progid:DXImageTransform.Microsoft.Gradient(GradientType="+gType+",StartColorStr=\"#" + params[1] + "\",EndColorStr=\"#" + params[2] + "\")";
	} else {
			colorArray = createColorPath(params[1],params[2]);
			x=0;y=0;
			if(params[3] == "horizontal") {
				w=Math.round(objArray[i].offsetWidth/colorArray.length);
				if(!w)w=1;
				h = objArray[i].offsetHeight;
			} else {
				h = Math.round(objArray[i].offsetHeight/colorArray.length);
				if(!h) h =1;
				w = objArray[i].offsetWidth;
			}
			makeGrandParent(objArray[i]);
			tmpDOM = document.createDocumentFragment();
			for(p=0;p<colorArray.length;p++) {
				g = document.createElement("div");
				g.setAttribute("style","position:absolute;z-index:0;top:" + y + "px;left:" + x + "px;height:" + h + "px;width:" + w + "px;background-color:rgb(" + colorArray[p][0] + "," + colorArray[p][1] + "," + colorArray[p][2] + ");");
				params[3] == "horizontal"?x+=w:y+=h;
				tmpDOM.appendChild(g);
				if(y>=objArray[i].offsetHeight || x >= objArray[i].offsetWidth) break;
			}
			objArray[i].appendChild(tmpDOM);
			tmpDOM = null;
		}
	}
}

function getGradientObjects() {
	a = document.getElementsByTagName("*");
	objs = new Array();
	for(i=0;i<a.length;i++) {
		c = a[i].className;
		if(c != "") if(c.indexOf("gradient") == 0) objs[objs.length] = a[i];
	} 
	return objs;
}
	
function createColorPath(color1,color2) {
	colorPath = new Array();
	colorPercent = 1.0;
	do {
		colorPath[colorPath.length]=setColorHue(longHexToDec(color1),colorPercent,longHexToDec(color2));
		colorPercent-=.01;
	} while(colorPercent>0);
	return colorPath;
}
		
function setColorHue(originColor,opacityPercent,maskRGB) {
	returnColor=new Array();
	for(w=0;w<originColor.length;w++) returnColor[w] = Math.round(originColor[w]*opacityPercent) + Math.round(maskRGB[w]*(1.0-opacityPercent));
	return returnColor;
}

function longHexToDec(longHex) {
	return new Array(toDec(longHex.substring(0,2)),toDec(longHex.substring(2,4)),toDec(longHex.substring(4,6)));	
}

function toDec(hex) {	
	return parseInt(hex,16);
}
	
function makeGrandParent(obj) {
	disp = document.defaultView.getComputedStyle(obj,'').display;
	disp == "block"?nSpan = document.createElement("div"):	nSpan = document.createElement("span");
	mHTML = obj.innerHTML;
	obj.innerHTML = "";
	nSpan.innerHTML = mHTML;
	nSpan.setAttribute("style","position:relative;z-index:10;");
	obj.appendChild(nSpan);
}

/*
New addictions: April 23, 2008.
*/
/* Calculate de width of the window in most browsers and most screen size */
function winWidth(){
	//if(window.innerWidth)return window.innerWidth;//
	if (document.documentElement) return document.documentElement.offsetWidth;
}


function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		do {
				curleft += obj.offsetLeft;
				curtop += obj.offsetTop;
			} while (obj = obj.offsetParent);
	}

	return curleft;
}

function changePositionStyle(){
		myVar = (findPos(texto)-30);
		JBCursive.style.left = myVar +"px";
		Grey.width = myVar + 70;
		try{
			if(document.all && !window.opera) {
				gradtd.style.position = "relative";
			}
			else{
				gradtd.style.position = "absolute";
			}
 
		}catch(e){}
		
}