function reset_show_Class(){
	try{
		show_str_Class_2.style.display = 'none';
		show_str_Class_3.style.display = 'none';
	}catch(e){}
}

function show_Class_2(strClassId,intTop){
	//按标签获取元素 
	var k = 0;
	show_str_Class_2.style.display = 'none';
	show_str_Class_3.style.display = 'none';
	var items = show_str_Class_2.getElementsByTagName("tt");
	for (var j=0; j<items.length; j++){
		if (items[j].className != strClassId){
			items[j].style.display = "none";
		}else{
			items[j].style.display = "";
			k = k +1;
		}
	}
	if(k>0){
		show_str_Class_2.style.display = '';
	}
	show_str_Class_2.style.pixelTop = intTop+21;
}

function show_Class_3(strClassId,intTop){
	//按标签获取元素 
	var k = 0;
	show_str_Class_3.style.display = 'none';
	var items = show_str_Class_3.getElementsByTagName("tt");
	for (var j=0; j<items.length; j++){
		if (items[j].className != strClassId){
			items[j].style.display = "none";
		}else{
			items[j].style.display = "";
			k = k +1;
		}
	}
	if(k>0){
		show_str_Class_3.style.display = '';
	}
	show_str_Class_3.style.pixelTop = intTop+21;
}

//获取位置
function getElementPos(elementId) {
var ua = navigator.userAgent.toLowerCase();
var isOpera = (ua.indexOf('opera') != -1);
var isIE = (ua.indexOf('msie') != -1 && !isOpera); // not opera spoof
var el = document.getElementById(elementId);
if(el.parentNode === null || el.style.display == 'none') {
return false;
}      
var parent = null;
var pos = [];     
var box;     
if(el.getBoundingClientRect)    //IE
{         
box = el.getBoundingClientRect();
var scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
var scrollLeft = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
return {x:box.left + scrollLeft, y:box.top + scrollTop};
}else if(document.getBoxObjectFor)    // gecko 
{
box = document.getBoxObjectFor(el); 
var borderLeft = (el.style.borderLeftWidth)?parseInt(el.style.borderLeftWidth):0; 
var borderTop = (el.style.borderTopWidth)?parseInt(el.style.borderTopWidth):0; 
pos = [box.x - borderLeft, box.y - borderTop];
} else    // safari & opera  
{
pos = [el.offsetLeft, el.offsetTop]; 
parent = el.offsetParent;     
if (parent != el) { 
while (parent) { 
pos[0] += parent.offsetLeft; 
pos[1] += parent.offsetTop; 
parent = parent.offsetParent;
} 
}   
if (ua.indexOf('opera') != -1 || ( ua.indexOf('safari') != -1 && el.style.position == 'absolute' )) { 
pos[0] -= document.body.offsetLeft;
pos[1] -= document.body.offsetTop;         
}    
}              
if (el.parentNode) { 
parent = el.parentNode;
} else {
parent = null;
}
while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML') { // account for any scrolled ancestors
pos[0] -= parent.scrollLeft;
pos[1] -= parent.scrollTop;
if (parent.parentNode) {
parent = parent.parentNode;
} else {
parent = null;
}
}
return {x:pos[0], y:pos[1]};
}

function getPos(divId)
{
var pos=getElementPos(divId);
return(pos.y);
//return(pos.x);
}