<input type="file" id="tp" name="tp"/>
<buttonοnclick="xxx()"></button>
function xxx(){
var f = document.getElementByIdx_x_x_x_x("tp").files[0];
var reader = newFileReader();
reader.onload = function(e) {
var data = e.target.result;
//加载图片获取图片真实宽度和高度
var image = new Image();
image.οnlοad=function(){
var width= image.width;
var height= image.height;
;
};
image.src= data;
};
reader.readAsDataURL(f);
}
