//��ŀ����
function initmenu() {
  $('#menu ul').hide();
  //$('#menu ul:first').show();
  $('#menu li a').click(
    function() {
      var checkelement = $(this).next();
      if((checkelement.is('ul')) && (checkelement.is(':visible'))) {
        return false;
        }
      if((checkelement.is('ul')) && (!checkelement.is(':visible'))) {
        $('#menu ul:visible').slideup('normal');
        checkelement.slidedown('normal');
        return false;
        }
      }
    );
  }


//������ʾ����
$(document).ready(function()
{
	$("#dianji").click(
	function(){
        $("#ceng2").slidetoggle(500);
	})
	
});
//����ѡ����
function qiehuan(num,sum){
		for(var id=1;id<=sum;id++)
		{
			if(id==num)
			{
				document.getelementbyid("qh_con"+id).style.display="block";
				document.getelementbyid("mynav"+id).classname="now_ka";
			}
			else
			{
				document.getelementbyid("qh_con"+id).style.display="none";
				document.getelementbyid("mynav"+id).classname="ka";
			}
		}
}

//ư����
$.fn.smartfloat = function() {
	var position = function(element) {
		var top = element.position().top, pos = element.css("position");
		$(window).scroll(function() {
			var scrolls = $(this).scrolltop();
			if (scrolls > top) {
				if (window.xmlhttprequest) {
					element.css({
						position: "fixed",
						top: 0
					});	
				} else {
					element.css({
						top: scrolls
					});	
				}
			}else {
				element.css({
					position: pos,
					top: top
				});	
			}
		});
	};
	return $(this).each(function() {
		position($(this));						 
	});
};
//ȫѡ��ȫ��ѡ
function selectcheckbox() {
	for (i = 0; i < document.myform.elements.length; i++) {
		if (document.getelementsbyname("selectcheck").item(0).checked == true) {
			document.myform.elements[i].checked = true;
		}
		else {
			document.myform.elements[i].checked = false;
		}
	}
}

//��ȡ�ұ�div��fu_right���ĸ߶�
function height(){
	var aa=document.getelementbyid('fu_right').offsetheight;
	var bb=document.getelementbyid('fu_left').offsetheight;
	if(aa>=bb){
	//document.getelementbyid('fu_left').offsetheight=height;
	document.getelementbyid('fu_left').style.height=aa+"px";
	}else{
		document.getelementbyid('fu_right').style.height=aa+"px";
		}
	//alert(aa);
	}
	

//pc����ֻ�����ʾ����
function sj_block(){
	if(document.getelementbyid("sj_pc").checked){
	document.getelementbyid('sj_lanmu').style.display="block";
	document.getelementbyid("pc").checked=false;
	}else{
	document.getelementbyid('sj_lanmu').style.display="none";	
	document.getelementbyid("pc").checked=true;
		}
}

function pc_block(){
	if(document.getelementbyid("pc").checked){
	document.getelementbyid("sj_pc").checked=false;
	document.getelementbyid('sj_lanmu').style.display="none";	
	}
}

//��ŀ����
function lanmu_none(){
	document.getelementbyid('mx_liuyan').style.display="none";
	//document.getelementbyid('mx_liuyan').style.display="none";
	//document.getelementbyid('mx_liuyan').style.display="none";
}
function lanmu_block(){
	document.getelementbyid('mx_liuyan').style.display="block";
	//document.getelementbyid('mx_liuyan').style.display="block";
	//document.getelementbyid('mx_liuyan').style.display="block";
}