function jsonp(a, b, c) {var d;d = document.createElement('script');d.src = a;c && (d.charset = c);d.onload = function() {this.onload = this.onerror = null;this.parentNode.removeChild(this);b && b(!0); //---1};d.onerror = function() {this.onload = this.onerror = null;this.parentNode.removeChild(this);b && b(!1); //---2};document.head.appendChild(d);};/*這個(gè)函數(shù)啥用？1，2處代碼是開關(guān)作用嗎？*/
幫我解讀這段Javascript代碼，謝謝
寶慕林4294392
2018-10-16 09:13:04
