学步园

//IE浏览器旋转方法
function ieTrans(o,d){  
	o.style.fileter=d
}
//非IE浏览器旋转方法
function notieTrans(o,d){
	o.style.MozTransform = d;
   	o.style.webkitTransform = d;
   	o.style.msTransform = d;
   	o.style.OTransform = d;
   	o.style.transform = d;
}

//图片顺时针旋转
function rightRotate(){
	var o=$('mainImg');
 	if(Browser.name=='ie'){//IE
  		var currentFilter = o.currentStyle.filter;
  		if (currentFilter){
   			var filterMatch = currentFilter.match(/rotation=(\d)+/);
   			var r = parseInt(filterMatch[1]) + 1;
   			if(r > 3) r = 0;
   			ieTrans(o,'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + r + ')');
  		}else{
   			ieTrans(o,'progid:DXImageTransform.Microsoft.BasicImage(rotation=1)');
  		}
 	}else{//非IE
  		var currentFilter = o.style.MozTransform;
  		//console.log(currentFilter);
  		if (currentFilter){  //
   			var filterMatch = currentFilter.match(/rotate\(([\-]?\d+)deg\)/);
   
   			var r = parseInt(filterMatch[1]) + 90;
   			if (r > 0) r = -270;
   			console.log('rotate(' + r + 'deg)');
   			notieTrans(o,'rotate(' + r + 'deg)');
  		}else{
  			//如果o.style.MozTransform不存在，就说明这是第一次旋转，也就是右转90度，-270
  			console.log('rotate(-270deg)');
  			notieTrans(o,'rotate(-270deg)');
   		}
  	}
}
//图片逆时针旋转
function leftRotate(){
	var o=document.getElementById('mainImg');
 	if(window.attachEvent){//IE
  		var currentFilter = o.currentStyle.filter;
  		if (currentFilter){
   			var filterMatch = currentFilter.match(/rotation=(\d)+/);
   			var r = parseInt(filterMatch[1]) - 1;
   			if(r < 0) r = 3;
   			ieTrans(o,'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + r + ')');
  		}
 	}else{//非IE
  		var currentFilter = o.style.MozTransform;
  		//console.log(currentFilter);
  		if (currentFilter){
   			console.log(currentFilter);
   			var filterMatch = currentFilter.match(/rotate\(([\-]?\d+)deg\)/);
   
   			var r = parseInt(filterMatch[1]) - 90;
   			if (r > 270) r = 0;
   			notieTrans(o,'rotate(' + r + 'deg)');
  		}else{
  			notieTrans(o,'rotate(270deg)');
  		}
  	}
}