function checkLogin()
{
	if(!document.frmInfo.UserName.value)
	{
		alert('请输入用户名称. ');
		
		document.frmInfo.UserName.focus();
		
		return;
	}

	if(!document.frmInfo.Password.value)
	{
		alert('请输入密码. ');
		
		document.frmInfo.Password.focus();
		
		return;
	}
	
	document.frmInfo.submit();
}

function reset()
{
   this.form.reset();	
}

function checkSubmit()
			{
				if(!document.frmInfotop.Keyword.value)
				{
					alert("请先输入关键字再进行搜索!");
					return;
				}
				
				if(document.frmInfotop.Pos.options[document.frmInfotop.Pos.selectedIndex].value == 'Name')
				{
					document.frmInfotop.Name.value = document.frmInfotop.Keyword.value;
					document.frmInfotop.action = '/list_category.php';
				}
				
				document.frmInfotop.submit();
			}

sfHover = function()
{
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	
	for (var i=0; i<sfEls.length; i++)
	{
		if(sfEls[i].className == "s")
		{
			sfEls[i].onmouseover=function()
			{
				this.className += " sfhover";
				var is_ie6 = (navigator.userAgent.toLowerCase().indexOf("ie 6") != - 1);
				if(is_ie6)
				{
				var tmp_select = document.getElementsByTagName("SELECT");
				for(var i = 0; i <tmp_select.length; i++)
				{
					if(tmp_select[i].name == 'bid' || tmp_select[i].name == 'rohs' || tmp_select[i].name.substring(0, 4) == 'pro_')
					tmp_select[i].style.visibility = "hidden";
				}
				}
			}
		
			sfEls[i].onmouseout=function() 
			{
				//alert('移上去前的主菜单css:'+this.className);
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
				//alert('移上去后的主菜单css:'+this.className);
				
				var objs = this.getElementsByTagName("a");				
				objs[0].style.fontColor = "black";
                				var is_ie6 = (navigator.userAgent.toLowerCase().indexOf("ie 6") != - 1);
				if(is_ie6)
				{
				var tmp_select = document.getElementsByTagName("SELECT");
				for(var i = 0; i < tmp_select.length; i++)
				{
					if(tmp_select[i].name == 'bid' || tmp_select[i].name == 'rohs' || tmp_select[i].name.substring(0, 4) == 'pro_')
					tmp_select[i].style.visibility = "visible";
				}
				}
			}
		}
	}
}
if (document.all){
window.attachEvent('onload',myonload)
}
else{
window.addEventListener('load',myonload,false);
}
function myonload()
{
	sfHover();
	preloadImg("/images/ico_01.gif");
}
function preloadImg()
{
	var pre_img = new Array();
	for(i=0;i<arguments.length;i++)
	{
	 pre_img[i] = new Image();
	 pre_img[i].src = arguments[i];		
	}
}