function button(){
	var oButton =document.getElementsByTagName("button");
	var aQuty=oButton.length;
	for(var i=0;i<aQuty;i++)
	 {
		 var aWidth = oButton[i].clientWidth;
		if (oButton[i].className=="button-afu")
				{
					if(aWidth<70){
						 oButton[i].className="width80 button-afu";
						 }
					
					  
					else if(aWidth>70 & aWidth<110){
						 oButton[i].className="width120 button-afu";
						 }
						 
					else if(aWidth>110& aWidth<150){
						 oButton[i].className="width160 button-afu";
						 }
					else if(aWidth>150& aWidth<190){
						 oButton[i].className="width200 button-afu";
						 }
					else if(aWidth>190& aWidth<230){
						 oButton[i].className="width240 button-afu";
						 }
					else if(aWidth>230& aWidth<270){
						 oButton[i].className="width280 button-afu";
						 }
					else{
						oButton[i].className="width320 button-afu";
						}
					
				}//以上为灰色按钮
				//以下为白色按钮
				
				else if (oButton[i].className=="button-afu-white")
				{
					if(aWidth<70){
						 oButton[i].className="width80-white button-afu-white";
						 }
					
					  
					else if(aWidth>70 & aWidth<110){
						 oButton[i].className="width120-white button-afu-white";
						 }
						 
					else if(aWidth>110& aWidth<150){
						 oButton[i].className="width160-white button-afu-white";
						 }
					else if(aWidth>150& aWidth<190){
						 oButton[i].className="width200-white button-afu-white";
						 }
					else if(aWidth>190& aWidth<230){
						 oButton[i].className="width240-white button-afu-white";
						 }
					else if(aWidth>230& aWidth<270){
						 oButton[i].className="width280-white button-afu-white";
						 }
					else{
						oButton[i].className="width320-white button-afu-white";
						}
					
				}
			
	 }
	 
}