function setStyle(objId, style, value) {
	document.getElementById(objId).style[style] = value;
}

function setClassName(objId, className) {
	document.getElementById(objId).className = className;
}

function imagePreLoad(image) {
	if (document.images) {
		rslt = new Image();
		rslt.src = image;
		return rslt;
	}
}
	

function opacity(id, opacStart, opacEnd, millisec) {
	var speed = Math.round(millisec / 100);
    var timer = 0; 
	var started = true;


    //determine the direction for the blending, if start and end are the same nothing happens 
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } else if(opacStart < opacEnd) {
    	
        for(i = opacStart; i <= opacEnd; i++) 
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 101); 
    object.MozOpacity = (opacity / 101); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
}



function currentOpac(id, opacEnd, millisec) {
    //standard opacity is 100 
    var currentOpac = 100;
    
    
    //if the element has an opacity set, get it 
    if(document.getElementById(id).style.opacity < 100) {
        currentOpac = document.getElementById(id).style.opacity * 100; 
    }

    //call for the function that changes the opacity 
    opacity(id, currentOpac, opacEnd, millisec)
    
}


function showit() {
var elt2 = document.getElementById("lyr1");
elt2.style.opacity = "1";
elt2.style.filter='';
}

function hideit() {
var elt2 = document.getElementById("lyr1");
elt2.style.opacity = ".2";
elt2.style.filter='progid:DXImageTransform.Microsoft.BasicImage(opacity=.2) progid:DXImageTransform.Microsoft.BasicImage(grayScale=1)';
}