function mousechangecss(changeid,cssname){
	document.getElementById(changeid).className=cssname;
}
function mousechangecss2(changeid,color){

	document.getElementById(changeid).style.backgroundColor=color;
}

function mainleft(){
			document.getElementById("mainleft1").onmouseover=function(){
				layshow("mainleft1_1","mainleft1");
				layshow("mainleft1_2","mainleft1");
			}
			document.getElementById("mainleft1").onmouseout=function(){
				layhidden("mainleft1_1","mainleft1");
				layhidden("mainleft1_2","mainleft1");
				
			}
			document.getElementById("mainleft2").onmouseover=function(){
				layshow("mainleft2_1","mainleft2");
				layshow("mainleft2_2","mainleft2");
			}
			document.getElementById("mainleft2").onmouseout=function(){
				layhidden("mainleft2_1","mainleft2");
				layhidden("mainleft2_2","mainleft2");
			}
			document.getElementById("mainleft3").onmouseover=function(){
				layshow("mainleft3_1","mainleft3");
				layshow("mainleft3_2","mainleft3");
			}
			document.getElementById("mainleft3").onmouseout=function(){
				layhidden("mainleft3_1","mainleft3");
				layhidden("mainleft3_2","mainleft3");
			}
			document.getElementById("mainleft4").onmouseover=function(){
				layshow("mainleft4_1","mainleft4");
				layshow("mainleft4_2","mainleft4");
			}
			document.getElementById("mainleft4").onmouseout=function(){
				layhidden("mainleft4_1","mainleft4");
				layhidden("mainleft4_2","mainleft4");
			}
			/*document.getElementById("mainleft5").onmouseover=function(){
				layshow("mainleft5_1","mainleft5");
				layshow("mainleft5_2","mainleft5");
			}
			document.getElementById("mainleft5").onmouseout=function(){
					
					layhidden("mainleft5_1","mainleft5");
					layhidden("mainleft5_2","mainleft5");
				}*/
	
}

function layshow(layname,relativename){
		document.getElementById(layname).style.display="block";
		/*document.getElementById(relativename).style.position="relative";*/
		
}

function layhidden(layname,relativename){
		document.getElementById(layname).style.display="none";
		/*document.getElementById(relativename).style.position="";*/
	
}