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<html><head><title>ejEval -- GoAhead Embedded JavaScript</title><link rel="stylesheet" href="../../../style/doc.css" type="text/css"></head><body><table width="550"> <tr><td><TABLE border=0 width=100% cellspacing=0 cellpadding=0 CLASS="apiTitle"><TR> <td class="titleLeft" align=left width="33%"><B>ejEval</B></TD><td class="titleCenter" align=center width="33%"><b>GoAhead JavaScript API</b></TD><td class="titleRight" align=right width="33%"><B>GoAhead EMF</B></TD></TR></TABLE><HR><h2>Synopsis</h2><p>Set the value of a JavaScript variable</p><h2>Prototype</h2><pre>#include "ej.h"int <b>ejEval</b>(int eid, char_t *script, char_t **errorMessage);</pre><h2>Parameters</h2><p><table width=90%> <TR> <TD width=40>eid <TD>JavaScript interpreter handle <TR> <TD width=40>script <TD> JavaScript to evaluate <TR> <TD width=40>errorMessage <TD> Error message</TD></TR></table><h2>Description</h2><P>The ejEval procedure evaluates a JavaScript script. If the script fails, a text message describing the erroris returned in <i>errorMessage</i>. This message is dynamicallyallocated and must be freed using <i>bfree</i>. <h2>Return Value</h2><p>Returns 0 if successful. Returns -1 on errors.</p><h2>Example</h2><pre>char_t *emsg; ejEval(eid, "write('Hello World');", &emsg);</pre><h2>See Also</h2><p><A href="../../../over/ejs.htm">JavaScript</A>, <A href="../../../over/asp.htm">Active Server Pages</A>, <A href="ejOpen.htm">ejOpen</A>, <A href="ejGetVar.htm">ejGetVar</A> </p></td></tr></table></body></html>⌨️ 快捷键说明
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