onmousemove鼠标截取
document.onmousemove = function(e) {
}
document.onmouseup = function(){
this.onmousemove = null;//阻止mousemove执行
this.onmouseup = null;
}
document.onmousemove = function(e) {
}
document.onmouseup = function(){
this.onmousemove = null;//阻止mousemove执行
this.onmouseup = null;
}