iframe自适应高度

 // iframe自适应高度     $(window).bind("load resize", function() {        topOffset = 50;        width = (this.window.innerWidth > 0) ? this.window.innerWidth : this.screen.width;        height = ((this.window.innerHeight > 0) ? this.window.innerHeight : this.screen.height) - 1;        height = height - topOffset;        if (height < 1) height = 1;        if (height > topOffset) {            //这里改为iframe的ID            var ifm= document.getElementById("scenterFrame");              ifm.height=height-15 +'px';                  }    });