// JavaScript Document
 function getStyle ( obj, attr ) {
      return obj.currentStyle?obj.currentStyle[attr] : getComputedStyle( obj )[attr];       //------
 }

//获取宽度 按比例 拟值给 容器高度-------------------------------------------------------------------------------------------
function zoujin() {
	var tupian = document.querySelector(".toubu_tupian"); //高度 
	var tupiano_w = tupian.offsetWidth; 
	//var pcac_bb = document.querySelector(".pcac_b"); //高度 
	//var acb_bb = document.querySelector(".acb"); //高度 
	//var pcac_bb_w = pcac_bb.offsetWidth; 
    //alert('wwww');
    if(tupiano_w > 1000){
		 tupian.style.height = tupiano_w/3.5 + 'px';
		// acb_bb.style.height = pcac_bb_w/6 + 'px';
		
	}
} 

//淡出淡入图片放大缩小---------------------------------------------------------------------------------------
function tupian(){
var toubu_tupiana = document.querySelector(".toubu_tupian_a"); 

    toubu_tupiana.style.transform= 'scale(1.3)';
    var timerwwwee = null;
    timerwwwee=window.setInterval(function(){
		toubu_tupiana.style.transform= 'scale(1)';
		toubu_tupiana.style.transition= 'all 30s';
    },30000)
			
			
    var ti = null;
    ti=window.setInterval(function(){
		toubu_tupiana.style.transform= 'scale(1.3)';
		toubu_tupiana.style.transition= 'all 30s';
    },60000)
}

  
window.onload = function(){	
      zoujin();
	  tupian();

}