一個能夠在頁面上隨意畫線、多邊形、圓，填充等功能的js

var jg_ihtm, jg_ie, jg_fast, jg_dom, jg_moz, jg_n4 = (document.layers && typeof document.classes != "undefined");app function chkDHTM(x, i) { x = document.body || null; jg_ie = x && typeof x.insertAdj

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