JavaScript限制div不跑出螢幕外邊

標籤：var   top   setw   clientx   window   eth   java   style   his   

 1 function fnMove(ev) { 2     var event = ev || window.event; 3     var l = event.clientX - this.disX; 4     var t = event.clientY - this.disY 5  6  7     if (l < 0) { 8         l = 0; 9     }10     else if (l > document.documentElement.clientWidth - this.oDiv.offsetWidth) {11 12         l = document.documentElement.clientWidth - this.oDiv.offsetWidth13     }14     ;15 16     if (t < 0) {17         t = 0;18     }19     else if (t > document.documentElement.clientHeight - this.oDiv.offsetHeight) {20 21         t = document.documentElement.clientHeight - this.oDiv.offsetHeight22     }23 24     this.oDiv.style.left = l + ‘px‘; 
25 　　 this.oDiv.style.top = t + ‘px‘;

 

JavaScript限制div不跑出螢幕外邊