function changeTab(selectClassName,unSelectClassName,key,content,preIndex){
	this.selectClassNameArr=new Array();
	this.unSelectClassNameArr=new Array();
	if(typeof(preIndex)!='number') this.preIndex=0;
	else this.preIndex=preIndex;
	this.change=function(index){
		var preKey=document.getElementById(key+this.preIndex);
		var preContent=document.getElementById(content+this.preIndex);
		var curKey=document.getElementById(key+index);
		var curContent=document.getElementById(content+index);
		if(preKey){			
			if(!this.unSelectClassNameArr[this.preIndex]){
				preKey.className=unSelectClassName;
			}
			else{
				preKey.className=this.unSelectClassNameArr[this.preIndex];
			}
		//alert(preKey.id);
		}
		if(!this.selectClassNameArr[index]){
				curKey.className=selectClassName;
		}
		else{
			curKey.className=this.selectClassNameArr[index];
		}		
		if(preContent){
			preContent.style.display='none';
		}
		curContent.style.display='';
		this.preIndex=index;
	};
	this.putClassName=function(selectClassName,unSelectClassName,index){
		this.selectClassNameArr[index]=selectClassName;
		this.unSelectClassNameArr[index]=unSelectClassName;
	};
}
var o1=new changeTab('current','normal','searchBtn_','searchDiv_',1);