本文实例讲述了JS实现放大、缩小及拖拽图片的方法。分享给大家供大家参考，具体如下：
0) {
images1.style.zoom = (zoom+10) + "%";
}*/
//将图片放大，失去热点
height1 = images1.height;
width1 = images1.width;
images1.height = height1 * 1.1;
images1.width = width1 * 1.1;
}
//还原
function realsize() {
images1.style.zoom=100+"%";
images1.height = images2.height;
images1.width = images2.width;
divId.style.left=v_left;
divId.style.top=v_top;
}
function featsize() {
var width1 = images2.width;
var height1 = images2.height;
var width2 = 360;
var height2 = 200;
var h = height1 / height2;
var w = width1 / width2;
if (height1 < height2 && width1 < width2) {
images1.height = height1;
images1.width = width1;
} else {
if (h > w) {
images1.height = height2;
images1.width = width1 * height2 / height1;
} else {
images1.width = width2;
images1.height = height1 * width2 / width1;
}
}
block1.style.left = 0;
block1.style.top = 0;
}
//鼠标滚轮放大缩小
function bbimg(o) {
/*var eleLeft;
var eleTop;
if(document.documentElement){
eleLeft = document.documentElement.scrollLeft;
eleTop = document.documentElement.scrollTop;
}
else{
eleLeft = document.body.scrollLeft;
eleTop = document.body.scrollTop;
}
v_left+=eleLeft;
v_top+=eleTop;
//divId.style.left=v_left;
//divId.style.top=v_top;
alert(document.documentElement.scrollTop +"----xxx"+document.body.scrollTop+window.pageyoffset);*/
var zoom = parseInt(o.style.zoom,10) || 100;
zoom += event.wheelDelta / 12;
if (zoom > 0) {
o.style.zoom = zoom + "%";
}
return false;
}
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》、《》、《》、《》及《》
希望本文所述对大家JavaScript程序设计有所帮助。
