/*
TruGreen Site Scripts
dhtml.js: global utility functions
*/

//extract URL parameter
function extract_parameter(paramname) {
	epb = null;
	epa = this.location.search;
	if (epa.indexOf(paramname+'=') != -1) {
		epb = epa.substring(epa.indexOf(paramname+'=')+paramname.length+1,epa.length);
		if (epb.indexOf('&') != -1) {
			epb = epb.substring(0,epb.indexOf('&'));
		}
	}
	return epb;
}


// PNG fix for IE, works on all pngs with class="pngfix" when called on page load
function correctPNG() {
	if (ie6) {
		for(var i=0; i<document.images.length; i++) {
			var img = document.images[i]
			var imgName = img.src.toUpperCase()
			if (imgName.substring(imgName.length-3, imgName.length) == "PNG"  &&  img.className.indexOf('pngfix') != -1) {
				var imgID = (img.id) ? "id='" + img.id + "' " : ""
				var imgClass = (img.className) ? "class='" + img.className + "' " : ""
				var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
				var imgStyle = "display:inline-block;" + img.style.cssText 
				if (img.align == "left") imgStyle = "float:left;" + imgStyle
				if (img.align == "right") imgStyle = "float:right;" + imgStyle
				if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle		
				var strNewHTML = "<span " + imgID + imgClass + imgTitle
				+ " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
				+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
				+ "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
				img.outerHTML = strNewHTML
				i = i-1
			}
		}
	}
}


// global code to deal with zip code fields everywhere
// since zip fields have different default copy, we have to pass that in from the call
function zip_clear(z,zvalue) {
	if ($('zipcode'+z).get('value') == zvalue) {
		$('zipcode'+z).set('value','');
	}
}

function zip_reset(z,zvalue) {
	if ($('zipcode'+z).get('value') == '') {
		$('zipcode'+z).set('value',zvalue)
	}
}

function tip_clear(t, tvalue) {
    if ($('tipssearch' + t).get('value') == tvalue) {
        $('tipssearch' + t).set('value', '');
    }
}

function tip_reset(t, tvalue) {
    if ($('tipssearch' + t).get('value') == '') {
        $('tipssearch' + t).set('value', tvalue)
    }
}