js解决movebox移动问题_javascript技巧

var movebox; window.onload = function () { movebox = document.getElementById("movebox"); movebox.addEventListener("mousedown", function (e) { if (e.button > 0) { fun2(); return false; } e.preventDefault && e.preventDefault(); //明哥：去掉图片拖动响应 狠重要 gen.x = e.clientX; gen.y = e.clientY; gen._x = movebox.offsetLeft; gen._y = movebox.offsetTop; gen.dx = gen.x - gen._x; gen.dy = gen.y - gen._y; document.addEventListener("mousemove",fun1,false); document.addEventListener("mouseup", fun2, false); }, false); }; var fun1 = function (e) { gen.L = e.clientX - gen.dx; gen.T = e.clientY - gen.dy; var timefun = function () { window.getSelection().removeAllRanges(); if (gen.L < 100) gen.L = 100; else if (gen.L > 200) gen.L = 200; if (gen.T < 125) gen.T = 125; else if (gen.T > 175) gen.T = 175; setLT(movebox, gen.L, gen.T); }; setTimeout(timefun, 2); }; var fun2 = function () { document.removeEventListener("mousemove", fun1, false); document.removeEventListener("mouseuo", fun2, false); }; var gen = { x: null, y: null, _x: null, _y: null, dx: null, dy: null, L: null, T:null, }; var setLT = function (dom, L, T) { dom.style.left = L + "px"; dom.style.top = T + "px"; };

body { position:absolute; margin:0; padding:0; } #center{ position:absolute; top:200px; left:300px; width:400px; height:400px; background-color:#808080; } #black{ position:absolute; width:400px; height:400px; z-index:80; background-color:#000; opacity:0.6; } #bigimg{ z-index:50; position:absolute; left:100px; top:125px; } #movebox{ z-index:100; position:absolute; width:100px; height:100px; left:150px; top:150px; overflow:hidden; cursor:move; background-color:#ff6a00; } #moveimg{ position:absolute; left:-50px; top:-25px; }